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import java.io.*;
public class writeFile{
public static void main(String[] args) throws Exception{
BufferedReader br=new BufferedReader(new inputStreamReader(System.in));
BufferedWriter bw=new BufferedWriter(new FileWriter("xxx.txt"));
String s;
while(true){
System.out.print("输入一个字符串!");
System.out.flush();
s=br.readLine();
if(s.length()==0)
break;
bw.write(s);
bw.newLine();
}
bw.close();
}
}